Araesk
Proven Member
- 188
- 1
- Jul 10, 2013
-
Muskego,
Wisconsin
Well I don't quite know where to begin. All I know is I'm knocking now and hearing the engine do it is killing me. I apologize for the length, just wanted to be as detailed and thorough as I could. I'll start with how it happened.
I just finished taking my TB off, cleaning off all the carbon I could and redrilling and tapping the ISC bolt hole since I managed to snap a bolt in there. I cleaned the whole thing out with my compressor and wiped down everything I could. I threw the TB, took my car for a couple spins to see if my idle surge and stalling out issue was gone. (If I depressed the clutch the idle would die sometimes if not given enough gas, was curious if fixed. Also checking if a boost leak was somehow magically fixed in this process but didn't notice anything too major). I drove over to my friend tuby's house, and along the way the boost randomly started working 100% again. It went from being a boggy kind of dragging feeling, to pushed-back-in-your-seat feeling like the turbo was clogged and that villain was finally defeated. I giggled in joy as I was pushed back in my seat again and was loving my boost.
After letting my car sit for about half an hour at tuby's I decided to head home. On the way, I went to check how my boost was doing, and the car went back to its prior state, where the boost gauge would read 14, but the car didn't pull at all. (Mind you AFR's, water temps were all normal). I came to a stop and the car stalled out like it did before. Turned it back on, rev'd to about 2.5k let off the clutch, and at about 5MPH BAM, something that felt like fuel cut, but I was only going 5MPH with negative vacuum.
The car drove fine still, but I went to test the boost once more thinking nothing of that violent jerking, and that's when a scraping started to happen. It started off scraping, then progressed worse and worse. I turned the car on for short increments to get it rolling, but the scrapping progressed and started to get worse and worse. I got the car back to Tuby's house, and by this point it progressed to a knock. The car is sitting there for the night and I'll get it back home tomorrow to start checking what's causing this horror. (The oil looked perfectly normal on the dipstick and i didn't see any metal shavings, nor any watered-down oil). Also, the compressor wheel looks good and still has no shaft play.
Things I have done to the car that would possibly create debris:
If the JB weld fell off the valve cover, and hit the cams and broke apart. I'd imagine that'd create a shit ton of noise and problems. And I saw little bit of oil pooling in my valve cover in the corner of those two bolts so i'm thinking it could be that. Any ideas, suggestions, or constructive criticism will be greatly appreciated. I'm going to put the engine at TDC tomorrow after removing the valve cover to inspect the JB weld, or where it should be, to check the rods for play across all 4 pistons. If both those report back negative. It is time to drop the oil pan and check the crank.
Thank you for taking the time to help me out here; and trust me the more I think about the JB weld on the inside, solely for cosmetic reasons, the more stupid I feel for doing it. Will report back with updates as soon as I can.
Will post videos later as well when they get uploaded and pictures as much as I Can.
I just finished taking my TB off, cleaning off all the carbon I could and redrilling and tapping the ISC bolt hole since I managed to snap a bolt in there. I cleaned the whole thing out with my compressor and wiped down everything I could. I threw the TB, took my car for a couple spins to see if my idle surge and stalling out issue was gone. (If I depressed the clutch the idle would die sometimes if not given enough gas, was curious if fixed. Also checking if a boost leak was somehow magically fixed in this process but didn't notice anything too major). I drove over to my friend tuby's house, and along the way the boost randomly started working 100% again. It went from being a boggy kind of dragging feeling, to pushed-back-in-your-seat feeling like the turbo was clogged and that villain was finally defeated. I giggled in joy as I was pushed back in my seat again and was loving my boost.
After letting my car sit for about half an hour at tuby's I decided to head home. On the way, I went to check how my boost was doing, and the car went back to its prior state, where the boost gauge would read 14, but the car didn't pull at all. (Mind you AFR's, water temps were all normal). I came to a stop and the car stalled out like it did before. Turned it back on, rev'd to about 2.5k let off the clutch, and at about 5MPH BAM, something that felt like fuel cut, but I was only going 5MPH with negative vacuum.
The car drove fine still, but I went to test the boost once more thinking nothing of that violent jerking, and that's when a scraping started to happen. It started off scraping, then progressed worse and worse. I turned the car on for short increments to get it rolling, but the scrapping progressed and started to get worse and worse. I got the car back to Tuby's house, and by this point it progressed to a knock. The car is sitting there for the night and I'll get it back home tomorrow to start checking what's causing this horror. (The oil looked perfectly normal on the dipstick and i didn't see any metal shavings, nor any watered-down oil). Also, the compressor wheel looks good and still has no shaft play.Things I have done to the car that would possibly create debris:
I drilled out an old, snapped out turbo bolt, but made sure to stuff a rag down the turbine housing so no shavings would get in there. Maybe a couple did while i pulled it out, but the tiniest flakes and a very minor amount.
- Next would be like I said before the TB. Possibly a couple shavings managed to remain in the hidden joining of the ISC to behind the butterfly plate in the TB, but again I blasted that thing so much before hand at 100 PSI that if any were left it would be next to nothing.
- Finally, the one candidate i think might cause it. I over-torqued the valve cover down, so there were minor cracks running around the 2 inner sprakplug tray bolt holes next to the cam gears. I put JB weld on the inside of the valve cover, figuring it would be fine since it is heat resistant and people said they put JB weld on their valve covers before. (Whether that was implying just the outside, I do not know, and my ignorance and stupidity are to blame then.)
If the JB weld fell off the valve cover, and hit the cams and broke apart. I'd imagine that'd create a shit ton of noise and problems. And I saw little bit of oil pooling in my valve cover in the corner of those two bolts so i'm thinking it could be that. Any ideas, suggestions, or constructive criticism will be greatly appreciated. I'm going to put the engine at TDC tomorrow after removing the valve cover to inspect the JB weld, or where it should be, to check the rods for play across all 4 pistons. If both those report back negative. It is time to drop the oil pan and check the crank.
Thank you for taking the time to help me out here; and trust me the more I think about the JB weld on the inside, solely for cosmetic reasons, the more stupid I feel for doing it. Will report back with updates as soon as I can.
Will post videos later as well when they get uploaded and pictures as much as I Can.
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.. And ok, well maybe I'll seeya out there!
